Displacement (psychology)

Acceleration

Electrical engineering

Physics

Engineering

Harmonic

Dissipation

Slosh dynamics

Psychology

Nonlinear system

Vibration

Acoustics

Shaker

Psychotherapist

Mechanics

Quantum mechanics

Structural engineering

Classical mechanics

Excitation

Thermodynamics

Dissipative system

Journal of Fluids and Structures

The effort to reduce costs and environmental impact of modern commercial aircraft requires an ever better understanding of aircraft physics, including the characterisation of the effective damping introduced on a structure by slosh dynamics. In this paper the experimental characterisation of vertical sloshing dissipative behaviour of a rectangular tank, representative of a scaled wing tank, is addressed. Specifically, a controlled electrodynamic shaker is employed to provide vertical displacement by means of sine-sweep excitation. High vertical acceleration makes the free surface unstable, triggering a nonlinear chaotic regime of the liquid stowed inside that experiences violent impacts with the surfaces of the tank. The obtained time histories of the measured accelerations and dynamic forces are shown to be directly related to the energy dissipated by the impacting fluid.

Experimental characterisation of sloshing tank dissipative behaviour in vertical harmonic excitation